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' (No Model.) v 4 ShetsSheet .1.

T. W. B. MUMPORD & R. MOODIE.

APPARATUS FOR THE GRADUAL REDUCTION AND SEPARATION OF ONES, 8w.

' No. 309,729. Patented Dec. 23, 1884.

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N. PETERS. Flmmlilho m her, Waxhmglflll. D. c.

4 sheet -sheet- 2Q T. W. B. MUMFOBD & R. MOODIE. APPARATUS FOR THE GRADUAL REDUCTION AND SEPARATION OF ORES; &q.

No. 309,729; Patented Dec. 23, 1884.

(No Model.)

Fla/16mm N. FETEI'TS. Plwwuxhom mn Washington. DJ;

(No Model.) I 4 ShetsSheet 3. T. W. B. MUMFORD 85 R. MOODI E. APPARATUS FOR THE GRADUAL REDUCTION AND SEPARATION OF ORES, @50- Patented 'Dec. 23, 1884.

Will/Il (No Model.) 7 4 Sheets-Sheet 4.

T. W. B. MUMFORD & R. MOODIE. I APPARATUS FOR THE GRADUAL REDUGTIONAND SEPARATION OF OBES, &c.

No. 309,729. Patented De0. 23, 1884.

NITED STAT S THOMAS \VILLIAM BASSETT DUCKS, COUNTY PATENT 5.1'FFICE.

MUMEo D ANDROBER'I MOODIE, or VICTORIA 0E EssEX, ENGLAND.

APPARATUS FOR THE GRADUAL REDUCTION AND SEPARATlON 0F ORES. 840..

SPECIFICATION forming part'of Letters Patent No. 309,729, dated December 23,1884.

Application filed May 12, 1884.

2;, 1 883, No. 5,846; in France Mar 5, 1884, No. 161,903;

in Belgium May 6, 1884, No. 65,062, and in Canada June 16, 1884, No. 19,574.

To all whom it may concern:

Be it known that we, THOMAS \VILLIAM BASSET'L MUMEORD, manager of chemical works, and ROBERT MooDIE, engineer, both subjects of the Queen of Great Britain and Ireland, and both residing at Victoria Docks, in the county of Essex, England,have invented certain Improvements in Apparatus for the Gradual Reduction and Separation of Ores, 850., for which we have obtained a patent in England, No. 5,846, dated December 22, 1883,)

of which the following is a specification.

Our said invention has for its object to pro vide an efficient and convenient apparatus for reducing to a fine state of division quartz, ores, phosphates, and other substances or materials; As a preliminary process,where necessary, the ores or other substances intended to be reduced to powder are first broken into small pieces by any suitable crushing-machine, into pieces of suitable size to be subjected to the action of the apparatus constituting our invention. The substances to be reduced are fed into a hopper, from which they are conducted by a chute or spout to an apparatus for separating therefrom pieces of iron-such, for example, as nails and the likethat may be mixed with the substances, which we will presume to be ore. This apparatus consists of a hopper, into which the ore is introduced, and which is provided at the lower end with an adjustable gate slide or door to regulate the discharge of the ore from the hopper onto a perforated or reticulated inclined plate or tray, which has a jogging motion imparted to it, and through the openings in which the broken ore passes, while any nails or pieces of metal or other extraneous substances that may be mixed with the ore will passover the openings and off the lower edge of the plate into a receptacle placed in position to receive them. The broken ore which passes through the openings falls or isconducted between a pair of crushing-rollers, by which it is pulverized,and passes thence into a chamber below, from which it is elevated by means of a chain of buckets or other suitable means into a hopper-shaped receptacle containing two sieves or riddles mounted loosely on a frame at a short distance one above the other. The frame carrying these sieves is suspended by means of spring blades or plates to overhead beams, and have a shaking or jogging motion imparted to it by means of cams, eccentrics, or other equivalent. In the interior of the receptacle, on opposite sides of the sieve-frame, are fitted spring-buffers,against which the said frame strikes at each to-and-fro motion, so as to give a more effective shaking or jogging motion to the sieve; or the jogging motion may be imparted by means of tappets or cams acting on the frame so as to cause it to receive ajumping up-and-down motion; or any other suitable means may be employed to obtain the desired effect. The receptacle below the sieve is divided by vertical or nearly vertical partitions into three compartments. The upper one of the two sieves or riddles is coarser or larger in the mesh than the lower one, and any of the materials that is too large to pass through the meshes of the upper sieve falls over the end thereof into one of the said compartments, and is conducted by a spout or chute back to the crushing-rollers of the separating apparatus, to befurther reduced or pulverized. The material which passes through the meshes of the upper sieve falls onto the lower sieve, and any that is too large to pass through the meshes of the said lower sieve passes over its end into another of the compart ments of the receptacle, and thence to between a pair of crushing-rollers arranged beneath the receptacle, while the material which is sufficiently fine to pass through the meshes of the lower sieve enters the third compartment and passes out by its spout or chute into a bag or other receptacle placed in position to receive it. The material which passes over the lower sieve is further reduced by the crushing-roll,- ers beneath the receptacle, and'falls into another receptacle below, from which it is elevated by a chain of buckets into another hop per-shaped receptacle similar to that last described, and with similar compartments and 5 sieves beneath, (in this case finer than in the a preceding,) and so on, to any required number of receptacles, crushing-rollers, and sieves or riddles, until the whole ofthe material is re- I rial from the hopper O is allowed to pass in duced to the required degree of fineness. The material as it passes from the receptacles to the crushing-rollers is conducted by inclined radiating troughs or Spreaders, so as to be equalized over the whole of the grinding-surfaces of the said rollers, and thus equalize the wear thereof. The said rollers are kept clear by rotating against brushes or cleaners, which are maintained in contact with the rollers by springs or equivalent means. The receptacles are provided in the interior with an adjustable valve or deflector-plate for the purpose of dividing the material which passes over the ends of the sieves orriddlcs, and conducting it partly back to the crushing -roller of the preceding receptacle and partly to the suc ceeding mill, or entirely to one or the other, as may be desired. The whole of the riddles or sieves of the various receptacles may be actuated simultaneously by eccentrics, cams, or tappets and rods connecting all the frames of the sieves or riddles. The spouts or chutes through which the reduced materials pass from the receptacles are provided with selfclosing flaps or doors, which are maintained open by the bag or receiver for the reduced material, but which flaps or doors close under the action of a spring or its equivalent when i the bag or receiver is removed.

And in order that our said invention may be fully understood, we shall now proceed more particularly to describe the same, and for that purpose shall refer to the several fi ures in the annexed sheets of drawings, the same letters of reference indicating corresponding parts in all the figures.

Figure 1 of our drawings represents a front elevation of an apparatus constructed or arranged according to our invention. Fig. 2 is a transverse section of the same, taken on the line 1 2, Fig. 1. Fig. 3 is avertical section of one of the receptacles containing the sieves or riddles and the deflector or valve for conducting the material into different channels, and Fig. 4 is aplan of a portion of the same. Fig. 5 is a sectional elevation of a part of the apparatus, showing an arrangement of brushes for keeping the crushing-rollers clean; and Fig. 6 is a detail showing one of the spreaders or radiating troughs for directing the material over the surface of the crushing rollers, so as to equalize the wear thereof.

The ore or other material to be reduced to powder may be preliminarily crushed by any suitable crushcrsuch, for example, as a Blake or a Halls crusher-which may be arranged so that the materials fall directly into ;he bin or receptacle A. The materials pass 'rom the said receptacle by the conducting :hute or trunk B into the hopper O of the ap- )ZtliliillS for separating pieces of iron-such as rails and other extraneous materialwhich, f not removed, would injure the reducing apiaratus orinterfere with its proper working. The separator consists of a perforated plate 1' recticulatcd tray, I), onto which the materegulated quantity as desired by an adjustable slide or gate, E. The openings in the plate or tray 1) are such that will admit of the material to be ground passing freely through them without any pieces of iron-such as nails and thelike-which will pass over the perforations and over the lower end of the plate or tray into any suitable receptacle. The material which passes through the openings in the plate or tray D falls onto an inclined plate or spreader, E, which may be dividedinto channels by strips of metal, by means of which the feed of the material may be equalized over the surface of the rollers G, to which the said ma terial. is conducted by hopper-like plates r This distributing or spreading plate is preferably constructed as described and claimed in an application filed by us May 28, 1884, Serial No. 183,091.. A shaking or jogging motion is imparted to the plate or tray 1) by means of a rotating tappet or cam, 00, which may be driven from the axle of one of the crushingrollers G by a strap, y, and pulleys The crushing-rollers receive their motion from the main driving-shaft II by means of driving straps and pulleys l, the rollers of each pair being geared together by spur-wheels K, which may be of equaldiameter, so as to cause both rollers to have the same surface-speed, or of different diameters, so as to cause the rollers to revolve at different speeds, and thus pro duce a combined crushing and rubbing action upon the material passing between them. The material passing from between the rollers G. after being acted upon thereby, is conducted by the inclined chute L into the bottom of the chamber M, and is elevated therefrom by an endless chain of buckets, N, and discharged into a chute, O, which conducts it into the separatirig-receptacleP. (Shown in section at Fig. 3.) This receptacle is divided by partitions Q into three compartments, R S T, and contains at the upper end two inclined sieves or riddles, U V, mounted loosely, one above the other, in a frame, \V, suspended by springplates X from overhead beams Y. The mesh of the upper sieve, U, is coarser the lower sieve, V. The material falls upon the upper sieve, and that which passes therethrough falls onto the lower sieve, and that which is sufficiently fine to pass through the meshes of the said lower sieve falls to the bot tom of the compartment It and out therefrom by the chute or spout Z into a bag or other rcceptacle placed in position to receive it. The material which is not sufficiently reduced to pass through the meshes of the upper sieve, U, passes over the lower edge thereof into the compartment S, andis conducted therefrom by the chute a back to the hopper U of the grinding apparatus, to be again subjected to the action of the rollers G. The material which passes through the sieve U onto the sieve V, but which is not sufficiently small to pass through the meshes of the latter, falls over the lower end thereof into the compartment T,

than that 01' and is conducted'by the chute binto a hopper,

eeptacle P. This receptacle is the same as.

the'r'ecsptacle P, (with the exception that the upper sieve or riddle in the receptacle 1? may he of finer mesh-than that 'cf'the receptacle 1 and the material is separated by the. sieves in this receptacle aflTeTthe-.-inanner described with regard-to the receptacle Pfthat which is too largeto pass through the upper sieve be ing conducted back to the rollers G'by the.

chute a, to be agaia'oper ted upon,- that l d, the'rods c of'which connect the whole of the, frames together, and thus impart motion to them all simultaneously; and in order tov impart a shaking or jogging motion to the sieves the frames ateach reciprocation are caused to strike against spring-bufiersf. sccured to the inner sidesof the receptacles; or instead of-employing spring-buffers, as described,- a jogging motion may be imparted to the sieves by means of rotating tappets or "cam-surfaces, as shown in dotted lines in Fig. 3, the projections on the rotating surfaces causing the frames carrying theriddles to rise and then to fall suddenly, and thereby in part to the riddles a violcntshaking motion, thus p'reventing the meshes of the sieves from becoming clogged. V

In'ordcr to keep the surfaces of the crushing-rollers clean, brushes are maintained in which passes through the upp igyc, but contact therewith by means of springs h, as which-is too large to pass through thelower: shown'in' Fig. 5, so that as the rollers rotate sieve, falling over the lower end thereof, and being conducted by. the chute b to another pair of rollers, G, to be further reduced,\vliile that'which passes through the lower sieve is conducted by the spout or chute Z into a bag or other suitable receptacle placed in position to receive it. The matcriabaftcr leaving the crushing-roller G, is again elevated and conducted into another separating-receptacle, P", where it is again subjected to a similar pro v cess of separation to that hereinbefore .de-

through the chute Z into a scribed, the material which is sufiiciently reduced passing'throngh thcsieves and thence cept-acle,the remainder being-conducted partly back to the rollers G and'pa'rtly to another pair of rollers, .G, to be further reduced and then elevated and deposited into another receptacle, P, and subjected to the same operations as before, and so on to any required number of separating-receptacles until the whole of the material, is' reduced to the required degree of fineness, tho-upper sieves oi" each snceeedihg receptacle being otj co nrsc finer than those of theprecedingreccpt acles, the 1mm sieves li'cing'all of the same degree of fineness.

, .mparted to The material may be distributed equally over the surfaces of thecrushing-rollers by means, at an inclosed conducting-plate, E, Fig. 6, fittedwith radiating strips F, forming troughs, throng-h which the material passes from the hopper C to between the rollers. By

. bending the metal strips F in one direction or the other the passage of the material. may be properlydirccted to give equality of wear of the rollers. p

in the drawings we have illustrated four separating receptacles, PI P" P, and four pairs of crushing-rollers, G G G G, which unmbers'wc have found to answer well; but any other convenient number may be em.- played.

the several receptacles, and consequently to the sieves themselves, by means of eccentrics bag or other re- 7 A sidewise-reeiprocating motion is the frame carrying the sieves of.

any of the material that may be adhering to them is removed.

The separating-rcceptacles l I" l? P -one or more of them--may be provided with an adjustable valve or deflector-plate, i, fitted \yith'a handle, K, for altering its position as required. By means of this valve or deflector the material passing over the ends of the sieves may be all conducted into either of the compartments S or '1, or a part of it may be. conducted into both compartments, as desired. For example, if 'it is desired to conduct the whole of the material into the compartments S, the valve is turned by means of the han= dle K so-as' to .eoverthe entrance to the compartment T, when the-whole of the material from the surface of both sieves will pass into the said compartment S, and be conducted therefrom back to the rollers through which it had previously passed to be further reduced, as ,hcrcinbefore described. By turning the valve 1' in the other direction, so as to cover the entrance to the compartment S, the whole of the material passing over both sieves will rollers. By arranging the position of the valve i"centrally between the two extreme positions, the material passing over the ends of the sieves will be about equally divided, and be conducted the one part into the compartmcnt S and the other art into the compartment T; but the proportion passing-into one or other of the compartments may be regulated by'inclining the valve more or less one side or theother, as desired, By means of this deflector-plate or valve i the material may be conducted back to the crushingrcllers as often as required, so as to reduce degree of fineness without tailings or residue the material may be passed in succession from one mill to another throughout these- .ries, and'thc tailings that remain after pass ing the last mill the whole of the material to the requiredv at the last miil or the series; or, if desired,

of the series may bacon;

lCO

ire

be conducted intothe compartment T, and frome thence to the next pair of crushingder is automatically closed.

ducted into a receptacle, 2, and be elevated therefrom into a bin or receiver, m, and passed therefrom, when desired, by e Jhute, onto the first pair of crushing-rollers G, to be subjected 'to the succession of separating and grinding the SopmCting-reeeptiteles i P FTP maybe provides. with en automatically-closing flap or door, '10, which, when the apparatus is at work, is he d open by the seek or other receptacle placed in position to receive the powdered material, and bearing upon or depressing the tail 1) of the door so as to eompress'the spring d. When, however, the pressure of the seek or receptacle is removed, the flop or door immedietely shuts under the action of the spring it, and the opening for the escape of the pewihe rolls are preferably made narrow, and run at u high speed. V .t

It is preferred that a jogging or vibrating motion be given to the sieves; out we tie-not limit ourselves thereto, is-the may be other- "Wise arranged. For example, they my be retating-eylimlrieal sieves, one within the other, the inner one being the first siere, which projeets at its delivery end beyond the other, and into ieli'tire n'mterhri is 1. The hereiu desei ibrd up mrntns for the gradual reduction n u'd separation of press, fire, seidhppnrut us consisting of n series of crush -:ing-rolls, hoppers therefor, it separator over the first pnir of rolls, a series of elerntors eerrespouding to the series of rolls, ind sieves above the aforesaid hoppers, in irhirh the The mouth or dis charge endoi' nespoutiorilhnte iii of eoehof,

east-72s elevators entry the materiel from below the "crushing-rolls, all substantially'as set forth.

2. The herein-described apparatus for the gradual reduction and separation of ores, &c., seidapparatus consisting of a series ofcrushiug-rolls. and corresponding elevators, reecp- 5 taeles containing sieves onto which the mate rial is fed by the elevators, and two conduits from said reeeptgele. one ieedin tothe next crushing-rolls of the series, whi ethe other leads back to the rolls from which the material has been elevated, all substantially us set; forth.

3. The hereiu-deseribedapparatus for the gradual reduction and separation of ores, the, said apparatus consisting of a series of crushing-rollsyG G, &c., and hoppers D O, the, arranged side by side, with corresponding elevators, M M, &e., sieve-receptacles P P. See, above and intermediatebetween the sets of rolls, and spouts a b 2%., leading from each receptacle to thedioppers of adjoining sets of crushing-relish all substantially as specified.

4. The combination of the sieves U V with the'reee 'itacle 1, having a-eompa-rtment, R,

' belowthe sieves, a discharge-spout therefor, and compartments S and T at the ends of the sieves, with dischargespouts in. opposite directions, substantially es described.

' in t estimonswhereof are hm'o signed our names to this specification in the presence oi two subscribing witnesses. I v

THOMAS WILLIAM li'AtlSET'l llll'lilhilih: ROBERT MOODIE. ifitnesse's:

.Unns. linens;

Guns, JAS. Jones, Both ef47 Lincoln'eimz Fdds, London, 

